Question

To solve this system using the addition method, you would need to multiply the first equation by what number in order for the y's to add out?
3x - y = 3

-2x + 2y = 6

Answer 1

You multiply 3x - y = 3.
So then it's:
6x - 2y = 3
-2x + 2y =6

which equals 4x = 9